be the worst day of bloodshed syria has suffered in almost 200 days of war. and syria is bracing for more violence today. international efforts to restore peace are continuing, but are they having any success? let's go to cnn's mohammed jamjoom. yesterday was the deadliest day since january of last year. claims of a mass execution coming out. tell me more about it. >> that's right, alison, opposition activists reporting at least 397 people killed yesterday. that's a staggering number, even by the standards in syria where these days routinely we're hearing that well over 100 people a day were killed because of the fighting there. what we're hearing, the reports that are emerging that in hums province that at least 200 people were killed after regime forces retook a city from the rebel free syrian army forces. now, one activist told us that they got some of their information from a captured syrian soldier that told them that many people had been rounded up. that they had been taking to a petro chemical plant there and executed. we're still trying to get more details about this. the syrian g